| Contracting Parties/Signatories | Signature | Instrument | In Force | Details |
|---|---|---|---|---|
| Bolivia (Plurinational State of) | October 25, 1979 | December 17, 1979 | ||
| Colombia | October 25, 1979 | December 17, 1979 | ||
| Ecuador | October 25, 1979 | December 17, 1979 | ||
| Peru | October 25, 1979 | December 17, 1979 | ||
| Venezuela (Bolivarian Republic of) | October 25, 1979 | December 17, 1979 |